Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200031 |
Resumo: | The Opaque-2 (O2) gene encodes a transcriptional activator specifically expressed for grain development of maize. o2 mutants have an opaque and chalky kernel, with a decrease in zein storage protein content, and an increase in the proportions of lysine and tryptophan. In this review, we present recent results investigating genetic properties of the O2 network, using transcriptome and proteome approaches, associated with measurements of activities of enzymes of the aspartate pathway and lysine degradation. The structural polymorphism at the O2 locus was investigated by RFLP in a collection of 51 maize inbred lines. Most polymorphic sites were found outside the coding regions. We then searched for relationships between RFLP polymorphism and (i) mRNA abundance of O2 and of known or suspected target genes, (ii) activity of SDH and (iii) amount of zein isoforms. Polymorphic restriction sites in the 5' upstream regions of the O2 gene were found associated with O2 mRNA abundance (three sites) and the amount of two 19 kDa alpha-zein isoforms (two sites). One restriction site on the 3' side of the O2 gene was found associated with Lor/Sdh mRNA abundance. Our results indicate relationships between polymorphism at the O2 locus and the expression of some of its target genes. Evidence of these associations has to be confirmed on larger samples, and the analysis of the O2 gene sequence should allow more precise testing of the actual involvement of O2 polymorphism in its own transcriptional expression, and in the expression of its target genes. |
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Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurementszeinaspartate kinaselysine oxoglutarate reductase/saccharopine dehydrogenasepolymorphismThe Opaque-2 (O2) gene encodes a transcriptional activator specifically expressed for grain development of maize. o2 mutants have an opaque and chalky kernel, with a decrease in zein storage protein content, and an increase in the proportions of lysine and tryptophan. In this review, we present recent results investigating genetic properties of the O2 network, using transcriptome and proteome approaches, associated with measurements of activities of enzymes of the aspartate pathway and lysine degradation. The structural polymorphism at the O2 locus was investigated by RFLP in a collection of 51 maize inbred lines. Most polymorphic sites were found outside the coding regions. We then searched for relationships between RFLP polymorphism and (i) mRNA abundance of O2 and of known or suspected target genes, (ii) activity of SDH and (iii) amount of zein isoforms. Polymorphic restriction sites in the 5' upstream regions of the O2 gene were found associated with O2 mRNA abundance (three sites) and the amount of two 19 kDa alpha-zein isoforms (two sites). One restriction site on the 3' side of the O2 gene was found associated with Lor/Sdh mRNA abundance. Our results indicate relationships between polymorphism at the O2 locus and the expression of some of its target genes. Evidence of these associations has to be confirmed on larger samples, and the analysis of the O2 gene sequence should allow more precise testing of the actual involvement of O2 polymorphism in its own transcriptional expression, and in the expression of its target genes.Escola Superior de Agricultura "Luiz de Queiroz"2002-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200031Scientia Agricola v.59 n.2 2002reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162002000200031info:eu-repo/semantics/openAccessLefèvre,AgnèsConsoli,LucianoGaziola,Salete A.Pellegrino,Ana PaulaAzevedo,Ricardo A.Damerval,Catherineeng2002-10-03T00:00:00Zoai:scielo:S0103-90162002000200031Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2002-10-03T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements |
title |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements |
spellingShingle |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements Lefèvre,Agnès zein aspartate kinase lysine oxoglutarate reductase/saccharopine dehydrogenase polymorphism |
title_short |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements |
title_full |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements |
title_fullStr |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements |
title_full_unstemmed |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements |
title_sort |
Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements |
author |
Lefèvre,Agnès |
author_facet |
Lefèvre,Agnès Consoli,Luciano Gaziola,Salete A. Pellegrino,Ana Paula Azevedo,Ricardo A. Damerval,Catherine |
author_role |
author |
author2 |
Consoli,Luciano Gaziola,Salete A. Pellegrino,Ana Paula Azevedo,Ricardo A. Damerval,Catherine |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lefèvre,Agnès Consoli,Luciano Gaziola,Salete A. Pellegrino,Ana Paula Azevedo,Ricardo A. Damerval,Catherine |
dc.subject.por.fl_str_mv |
zein aspartate kinase lysine oxoglutarate reductase/saccharopine dehydrogenase polymorphism |
topic |
zein aspartate kinase lysine oxoglutarate reductase/saccharopine dehydrogenase polymorphism |
description |
The Opaque-2 (O2) gene encodes a transcriptional activator specifically expressed for grain development of maize. o2 mutants have an opaque and chalky kernel, with a decrease in zein storage protein content, and an increase in the proportions of lysine and tryptophan. In this review, we present recent results investigating genetic properties of the O2 network, using transcriptome and proteome approaches, associated with measurements of activities of enzymes of the aspartate pathway and lysine degradation. The structural polymorphism at the O2 locus was investigated by RFLP in a collection of 51 maize inbred lines. Most polymorphic sites were found outside the coding regions. We then searched for relationships between RFLP polymorphism and (i) mRNA abundance of O2 and of known or suspected target genes, (ii) activity of SDH and (iii) amount of zein isoforms. Polymorphic restriction sites in the 5' upstream regions of the O2 gene were found associated with O2 mRNA abundance (three sites) and the amount of two 19 kDa alpha-zein isoforms (two sites). One restriction site on the 3' side of the O2 gene was found associated with Lor/Sdh mRNA abundance. Our results indicate relationships between polymorphism at the O2 locus and the expression of some of its target genes. Evidence of these associations has to be confirmed on larger samples, and the analysis of the O2 gene sequence should allow more precise testing of the actual involvement of O2 polymorphism in its own transcriptional expression, and in the expression of its target genes. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200031 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200031 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162002000200031 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.59 n.2 2002 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936458388897792 |